Acute severe depression following peri-operative ondansetron.

A 41-year-old woman with a strong history of postoperative nausea and vomiting presented for abdominal hysterectomy 3 months after a previous anaesthetic where ondansetron prophylaxis had been used. She had developed a severe acute major depression disorder almost immediately thereafter, possibly related to the use of a serotonin antagonist. Nine years before she had experienced a self-limited puerperal depressive episode. Anaesthesia with a propofol infusion and avoidance of serotonin antagonists provided a nausea-free postoperative course without exacerbation of the depression disorder.